// 列传内的条目
import {decodeArrayListStr, readFileAndParse} from '../util'
import { FILENAME } from '../../consts'
const _ = require('lodash');

export interface DicAuthorsBook {
    // 列传id
    readonly id: number;
    // 限制条件
    readonly limit: { type: number, bookId?: number, value: number }[];
}

type KeysEnum<T> = { [P in keyof Required<T>]: true };
const DicAuthorsBookKeys: KeysEnum<DicAuthorsBook> = {
    id: true,
    limit: true,
}

export const dicAuthorsBook = new Map<number, DicAuthorsBook>();
export function loadAuthorsBook() {
    dicAuthorsBook.clear();
    let arr = readFileAndParse(FILENAME.DIC_AUTHORS_BOOK);

    arr.forEach(o => {
        o.limit = parseLimit(o.limit);
        dicAuthorsBook.set(o.id,  _.pick(o, Object.keys(DicAuthorsBookKeys)));
    });
    arr = undefined;
}

function parseLimit(str: string) {
    let result: { type: number, bookId?: number, value: number }[] = [];
    if (!str) return result;
    let decodeArr = decodeArrayListStr(str);
    for (let [ str1, str2, str3 ] of decodeArr) {
        if (isNaN(parseInt(str1)) || isNaN(parseInt(str2)) || (str3 && isNaN(parseInt(str3)))) {
            throw new Error('data table format wrong');
        }
        if(str3) {
            result.push({ type: parseInt(str1), bookId: parseInt(str2), value: parseInt(str3) });
        } else {
            result.push({ type: parseInt(str1), value: parseInt(str2) });
        }
    }
    return result
}